diff --git a/wp-content/themes/twentyten/attachment.php b/wp-content/themes/twentyten/attachment.php
index c35f4c8d78..f805bcdbad 100644
--- a/wp-content/themes/twentyten/attachment.php
+++ b/wp-content/themes/twentyten/attachment.php
@@ -9,7 +9,7 @@
 
 get_header(); ?>
 
-		<div id="container">
+		<div id="container" class="single-attachment">
 			<div id="content" role="main">
 
 <?php if ( have_posts() ) while ( have_posts() ) : the_post(); ?>
diff --git a/wp-content/themes/twentyten/style.css b/wp-content/themes/twentyten/style.css
index 82ec32e229..29ea1ff6c2 100644
--- a/wp-content/themes/twentyten/style.css
+++ b/wp-content/themes/twentyten/style.css
@@ -762,6 +762,7 @@ body.page .edit-link {
 	margin: 0;
 	height: auto;
 	max-width: 640px;
+	width: auto;
 }
 #content .attachment img {
 	max-width: 900px;